The vote
On the evening of April 16, 2026, the electors of the Town of Cassville -- a township of roughly 800 residents in northwestern Grant County, Wisconsin, sitting on a bend of the Mississippi River -- gathered for a special meeting. Forty-four people cast ballots. Zero of them voted against an ordinance that would authorize the town supervisors to exercise zoning authority and ban data centers in the township for up to two years without explicit board approval.
Under Wisconsin's town-electors statute, that unanimous show of hands is binding. It instructs the elected supervisors to act. The ordinance prevents any data center from being permitted in the town for the duration of the ban, and prevents land-use changes -- like converting farm field to industrial site -- without town-board approval.
The vote was a response to something the residents had only partially learned about: that an unnamed developer had been quietly assessing the township as the site for a billion-dollar, 400-to-500-megawatt data center campus on roughly 500 acres. The developer had promised, in conversations with a small number of local officials, about 50 jobs and more than $5.5 million in annual property-tax revenue. The site location was not publicly disclosed. The company never identified itself. The proposal never made it to a formal application.
It did not need to. Once Cassville residents pieced together what was happening, the town used the only tool it had -- preemptive zoning -- to make sure the proposal could not proceed.
Who, exactly, was proposing this?
Nobody outside the room knows. That is part of the story.
Wisconsin Watch, which broke this on April 29, reports that the developer was characterized by local officials as a shell or front entity inquiring on behalf of an unnamed end customer. Town Attorney Eric Hagen described the developer's posture to Wisconsin Watch as "looking for the lowest-hanging fruit" -- the small rural townships with limited staff capacity, where a project of this scale could potentially be moved through the permitting process before residents organized in response.
This pattern is not new. Across the dozens of data center sitings we have tracked on PoweredByWho, the most common opening move is for the actual operator -- a hyperscaler like Microsoft, Meta, Google, Amazon, or one of the wholesale colocation giants -- to never appear on the initial filings. Land options and rezoning requests are typically routed through subsidiary LLCs or through real estate developers operating on behalf of an undisclosed tenant. The developer name on the public record at the front of the process is almost never the company that will run the campus. Sometimes the identity is disclosed later, in groundbreaking ceremonies or economic-development announcements. Sometimes -- as in the Cassville case -- the proposal dies before the developer is named, and the trail simply ends.
This is the asymmetry that drives most of the anti-data-center organizing we report on. Multibillion-dollar deals that will permanently alter a rural community's water, electric, and tax base get evaluated by part-time town boards with no NDA-restriction laws on their side. In Wisconsin specifically, state lawmakers are actively sponsoring legislation to restrict the non-disclosure agreements that economic-development authorities sign at the request of data-center developers -- but that bill has not yet passed. The Cassville vote took place under the current rules: secrecy on the developer side, public reckoning on the resident side.
Cardinal-Hickory Creek
Why Cassville? Why now? The most likely answer is on our new map.
The Cardinal-Hickory Creek transmission line -- a 102-mile, 345-kilovolt high-voltage corridor running from Dubuque County, Iowa, across the Mississippi River, through Grant County, Wisconsin, to a substation in Dane County near Madison -- entered service in September 2024 after roughly a decade of permitting and litigation. It was financed by ATC, ITC, and Dairyland Power Cooperative under the umbrella of the Midcontinent Independent System Operator's grid-buildout plan, and is one of the largest new pieces of transmission capacity to come online in the Upper Midwest in years.
The Cardinal-Hickory Creek line runs through the Town of Cassville. From a power-sourcing perspective, a 400-to-500-megawatt data center sited within tap-in range of a brand-new 345 kV line solves the single hardest siting constraint a hyperscale data center faces today: where to interconnect at gigawatt-class voltage without waiting five-plus years for a new transmission build. Cassville's geographic position -- rural land, low population density, low local political resistance assumed, and a fresh 345 kV line passing through -- is exactly the profile a data-center site selector would flag as a candidate.
We are not claiming the developer's site selectors named Cardinal-Hickory Creek as their reason. We do not have that document. What we can say with confidence is what the public record shows: the line entered service in September 2024, the developer's inquiry surfaced shortly afterward, and the proximity is not coincidence at the level of how the data-center industry chooses sites. You can see the Cardinal-Hickory Creek line, and the rest of the U.S. high-voltage transmission grid, on our newly launched Power Mode at poweredbywho.com/map?mode=power. The Town of Cassville sits right alongside it.
The trade-off the line was supposed to deliver -- more renewable energy capacity onto the Midwest grid, lower congestion costs for ratepayers -- has now collided with a different consequence that the line's planners did not explicitly market: that high-voltage transmission, once built, attracts data centers, and the communities along the line bear the secondary footprint. Cassville is one such community. It will not be the last along Cardinal-Hickory Creek.
The Driftless Area is not anywhere
The third element of the Cassville story is what the land in question actually is.
The Driftless Area is a roughly 24,000-square-mile region across southwestern Wisconsin, northwestern Illinois, northeastern Iowa, and southeastern Minnesota that the most recent ice ages essentially missed. While the rest of the upper Midwest was scoured flat by glaciers, the Driftless retained its pre-glacial topography: deeply cut river valleys, steep wooded ridges, exposed limestone bluffs, and an exceptional density of cold-water trout streams fed by groundwater aquifers in the limestone karst geology. Roughly 100 miles of the Mississippi River corridor through this region is designated nationally as ecologically significant. The Town of Cassville sits squarely inside it.
This geography matters at two levels. First: groundwater. Karst geology means surface contamination -- from construction, from cooling-tower blowdown, from emergency-generator fuel storage -- can move quickly and unpredictably into the aquifer that residents draw their well water from. "Property values, well contamination, electric bills" was the way Cassville residents themselves summarized their concerns to Wisconsin Watch. The wells came first. Second: the visual and cultural footprint. A 500-acre data center campus in a region that markets itself for trout fishing, kayaking, agritourism, and small-town heritage is not a neutral siting; it is a structural change in what the place is.
Retired Cassville resident John Hawn, on the record to Wisconsin Watch on what the developer presumably had not factored in: "This is the Driftless area for Christ's sakes."
Town Supervisor Scott Riedl, on what the town board itself had been told: "I don't know really what to think about it because there's no information."
In other words: the developer's whisper-stage approach to Cassville assumed a community that would weigh the $5.5-million-per-year property-tax revenue and the 50 jobs against an abstract loss. What the developer encountered instead was a community that already had a strong shared sense of place, well-informed retirees with time to organize, and a town-electors statute that gives ordinary residents a binding vote on zoning authority. The proposal did not survive contact with the actual town.
The pattern, and what to watch
Cassville is one data point. It is also part of a broader pattern we have been tracking, with Wisconsin specifically running well ahead of the rest of the country.
Port Washington, Wisconsin (Ozaukee County, on Lake Michigan) ran the country's first anti-data-center referendum in November 2025: a binding ballot question requiring voter approval before the city can grant any tax incentives to a data center. It passed.
Menomonie, Wisconsin (Dunn County, ~80 miles east of the Twin Cities) blocked a $1.6 billion, 320-acre proposal by Balloonist LLC -- an entity whose end customer was never publicly disclosed -- on January 5, 2026. Mayor Randy Knaack had paused the project the previous September after a community-opposition Facebook group grew past 10,000 members in a town of fewer than 17,000 people. The organizers behind that effort (Blaine Halverson, Sarah Zarling, and Brittany Keyes) have since launched Healthy Climate Wisconsin, which in December 2025 published a 42-point municipal-ordinance toolkit covering transparency, administrative review, infrastructure protection, and zoning. Port Washington, Beaver Dam, Mount Pleasant, DeForest, Janesville, and Kenosha are among the Wisconsin cities now adopting or evaluating pieces of that toolkit.
Bulloch County, Georgia, banned data centers preemptively before any specific project arrived -- a county-level zoning move in advance of the rush.
Clayton County, Iowa (also in the Driftless Area, directly across the Mississippi from Cassville and along the same transmission corridor) is currently considering zoning, setback, and size restrictions on data centers.
The Town of Cassville is now in this group, and is meaningfully harder for the industry to dismiss than Port Washington or Bulloch: it acted at the township level, in response to a specific live proposal, through the binding electors statute, with literally zero "no" votes. There is no "loud minority" framing available here. Read alongside Menomonie's 44-day organizing arc and the spreading Healthy Climate Wisconsin toolkit, the Wisconsin signal is unmistakable: when small communities get organized in time, the industry's playbook fails.
Three things worth watching going forward:
1. Whether the same anonymous developer surfaces elsewhere along the Cardinal-Hickory Creek line. The site-selection logic that pointed at Cassville did not stop at the township line. Other Grant County towns -- and Crawford, Iowa, Lafayette, Dane on the Wisconsin side, and Dubuque on the Iowa side -- have the same proximity to the new 345 kV corridor. The next public-records request we file will be on neighboring townships' planning-commission agendas for the rest of 2026.
2. Whether Wisconsin's pending NDA-restriction legislation passes. Today, economic-development authorities can and do sign non-disclosure agreements that prevent town residents from learning the identity of a developer prospecting their community. If that statute changes, the Cassville scenario -- where the developer never has to name itself -- becomes harder to repeat.
3. Whether Cassville's two-year moratorium gets extended or made permanent. The current ordinance bans data centers for up to two years. If a new proposal surfaces in 2027, the town board will have to vote again. We will be watching that meeting.
If you live in a township along a major new high-voltage transmission line -- Cardinal-Hickory Creek, Grain Belt Express, SunZia, or any of the other large 345-to-500 kV builds entering service in 2024 through 2027 -- the Cassville playbook is the playbook. Find out what zoning authority your town has. Find out who else has been approached. Use the tools you have before the actual application lands. The vote tally in Cassville was 44 to 0 because the town moved first.